Langley (unit)

The langley (Ly) is a unit of heat transmission, especially used to express the rate of solar radiation (or insolation) received by the earth. The unit was proposed by Franz Linke in 1942^[1] and named after Samuel Pierpont Langley (1834–1906) in 1947.

Definition

One langley is

1 thermochemical calorie per square centimetre,^[2] i. e.
41840 J/m² (joules per square metre),
ca. 11.622 watt-hours per square metre.^[3]

References

^ Gyllenbok, Jan (2018). "langley". Encyclopaedia of Historical Metrology, Weights, and Measures, Volume 1. Birkhäuser. p. 139. ISBN 9783319575988.
^ "Appendix B9. Conversion Factors". NIST Guide to the SI. The National Institute of Standards and Technology. 2010-10-05. Retrieved 2013-04-14.
^ "Solar Energy at Race Rocks". Archived from the original on 2013-10-05. Retrieved 2010-08-05.

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[1] Gyllenbok, Jan (2018). "langley". Encyclopaedia of Historical Metrology, Weights, and Measures, Volume 1. Birkhäuser. p. 139. ISBN 9783319575988.

[nistguide-2] "Appendix B9. Conversion Factors". NIST Guide to the SI. The National Institute of Standards and Technology. 2010-10-05. Retrieved 2013-04-14.

[3] "Solar Energy at Race Rocks". Archived from the original on 2013-10-05. Retrieved 2010-08-05.

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[2]

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Definition

See also

References